<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>01_JS的三种引入方式</title>
    <script src="01.js">

    </script>

</head>
<body>
    <button onclick="alert('你来真的啊?')">是兄弟就来点我</button>
    <button onclick="console.log('你完了!!!')">别点我</button>

    <h1 id="aaa">我是一个标题</h1>
    <script>
        console.log("我是内部JS,我被执行了")
        console.log(aaa)
    </script>

</body>
</html>